twodns-update-host.php

<?php

#### configuration ####
$email = 'YOUR_EMAIL_ADDRESS';
$token = 'YOUR_API_TOKEN';
$hostName = 'all'; // use 'all' if you want to update all hosts


#### cURL request below ####
$json_data = json_encode(array(
  'ip_address' => 'auto'
));

$curl = curl_init("https://api.twodns.de/hosts/${hostName}");
curl_setopt_array(
  $curl,
  array(
    CURLOPT_USERPWD => "${email}:${token}",
    CURLOPT_CUSTOMREQUEST => 'PUT',
    CURLOPT_POSTFIELDS => $json_data
  )
);

curl_exec($curl);
curl_close($curl);